It doesn't matter if it's a CD, a Film, or manual with the instructions to build a spaceship. If you copy it, the original owner doesn't lose anything. If you don't copy it, the only one missing something (the experience) is YOU.
Enjoy!
Of course, if you happen to have some extra money for donations to creators, please do so. If you don't have that, try contributing with a review somewhere or recommending the content, spread the word. Piracy was shown to drive businesses in several occasions by independent and biased corps (trying to show the opposite).
So if I torrent something from someone who paid for it, it's like checking it out from a library's collection and not piracy. Got it.
/s?
Yes, exactly. But better, because by “checking it out” you're not preventing anyone else from also enjoying it at the same time (on the contrary, by nature of the bittorrent protocol you're improving the availability of said cultural work, helping to preserve it, and culturally enriching society to a greater extent than libraries can unless they don't artificially restrict access to digital works).